Animation playback in dedicated server is faster

I found when dedicated server is playing an animation, if that animation’s duration is like about 1 second, then the server will only play that animation for about 0.5s. I’ve tried many times, each time the server’s playback time is slightly different, but they are all way faster than they should be. I added two notifies in the animation, one at the beginning and one at the end, and both notifies print a message, I used this way to observe the playback time. And I also found this is only happening when the first time a client connects to the dedicated server, if the client disconnects and re-connect to the server, everything is normal. And the listen server is normal, too.

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